Vallejo Kids Book Fest on Saturday, August 1, 2026 at Vallejo John F. Kennedy Library (Library). Cost: Free. Best for: toddler, preschool, school-age, tween. Calling all bookworms and book dragons! Join us for the Vallejo Kids Book Fest on Saturday, August 1, from 10 a.m.–3 p.m. at JFK Library. Call